From 4a31ba57cae853ce1ac00a22c0f5d80bd36685ed Mon Sep 17 00:00:00 2001 From: Stefan Weinhuber Date: Wed, 24 Mar 2010 11:49:53 +0100 Subject: [S390] dasd: fix alignment of transport mode recovery TCW All TCWs need to be aligned on a 64 byte boundary or the I/O will be rejected. For recovery requests we create fresh TCWs, so we need to do the proper alignment here as well. Signed-off-by: Stefan Weinhuber Signed-off-by: Martin Schwidefsky --- drivers/s390/block/dasd_3990_erp.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'drivers/s390/block') diff --git a/drivers/s390/block/dasd_3990_erp.c b/drivers/s390/block/dasd_3990_erp.c index 51224f76b980..b3736b8aad39 100644 --- a/drivers/s390/block/dasd_3990_erp.c +++ b/drivers/s390/block/dasd_3990_erp.c @@ -2287,7 +2287,8 @@ static struct dasd_ccw_req *dasd_3990_erp_add_erp(struct dasd_ccw_req *cqr) if (cqr->cpmode == 1) { cplength = 0; - datasize = sizeof(struct tcw) + sizeof(struct tsb); + /* TCW needs to be 64 byte aligned, so leave enough room */ + datasize = 64 + sizeof(struct tcw) + sizeof(struct tsb); } else { cplength = 2; datasize = 0; @@ -2316,8 +2317,8 @@ static struct dasd_ccw_req *dasd_3990_erp_add_erp(struct dasd_ccw_req *cqr) if (cqr->cpmode == 1) { /* make a shallow copy of the original tcw but set new tsb */ erp->cpmode = 1; - erp->cpaddr = erp->data; - tcw = erp->data; + erp->cpaddr = PTR_ALIGN(erp->data, 64); + tcw = erp->cpaddr; tsb = (struct tsb *) &tcw[1]; *tcw = *((struct tcw *)cqr->cpaddr); tcw->tsb = (long)tsb; -- cgit v1.2.3 From b8fde7224d771ce55bfd67cb57d7c4c8f430972f Mon Sep 17 00:00:00 2001 From: Stefan Haberland Date: Wed, 24 Mar 2010 11:49:54 +0100 Subject: [S390] dasd: check tsb validity Check tsb validity before the tcw_get_tsb function is called. Signed-off-by: Stefan Haberland Signed-off-by: Martin Schwidefsky --- drivers/s390/block/dasd_eckd.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/s390/block') diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c index 01f4e7a34aa8..0cb233116855 100644 --- a/drivers/s390/block/dasd_eckd.c +++ b/drivers/s390/block/dasd_eckd.c @@ -3155,11 +3155,11 @@ static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, tsb = NULL; sense = NULL; - if (irb->scsw.tm.tcw) + if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs == 0x01)) tsb = tcw_get_tsb( (struct tcw *)(unsigned long)irb->scsw.tm.tcw); - if (tsb && (irb->scsw.tm.fcxs == 0x01)) { + if (tsb) { len += sprintf(page + len, KERN_ERR PRINTK_HEADER " tsb->length %d\n", tsb->length); len += sprintf(page + len, KERN_ERR PRINTK_HEADER -- cgit v1.2.3 From 5a0e3ad6af8660be21ca98a971cd00f331318c05 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 24 Mar 2010 17:04:11 +0900 Subject: include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo Guess-its-ok-by: Christoph Lameter Cc: Ingo Molnar Cc: Lee Schermerhorn --- drivers/s390/block/dasd_3990_erp.c | 1 - drivers/s390/block/dasd_alias.c | 1 + drivers/s390/block/dasd_devmap.c | 1 + drivers/s390/block/dasd_eer.c | 1 + drivers/s390/block/dasd_ioctl.c | 1 + drivers/s390/block/dasd_proc.c | 1 + drivers/s390/block/xpram.c | 2 +- 7 files changed, 6 insertions(+), 2 deletions(-) (limited to 'drivers/s390/block') diff --git a/drivers/s390/block/dasd_3990_erp.c b/drivers/s390/block/dasd_3990_erp.c index b3736b8aad39..6927e751ce3e 100644 --- a/drivers/s390/block/dasd_3990_erp.c +++ b/drivers/s390/block/dasd_3990_erp.c @@ -10,7 +10,6 @@ #define KMSG_COMPONENT "dasd-eckd" #include -#include #include #define PRINTK_HEADER "dasd_erp(3990): " diff --git a/drivers/s390/block/dasd_alias.c b/drivers/s390/block/dasd_alias.c index 148b1dd24070..8c4814258e93 100644 --- a/drivers/s390/block/dasd_alias.c +++ b/drivers/s390/block/dasd_alias.c @@ -8,6 +8,7 @@ #define KMSG_COMPONENT "dasd-eckd" #include +#include #include #include "dasd_int.h" #include "dasd_eckd.h" diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c index 8e23919c8704..eff9c812c5c2 100644 --- a/drivers/s390/block/dasd_devmap.c +++ b/drivers/s390/block/dasd_devmap.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include diff --git a/drivers/s390/block/dasd_eer.c b/drivers/s390/block/dasd_eer.c index 1f3e967aaba8..dd88803e4899 100644 --- a/drivers/s390/block/dasd_eer.c +++ b/drivers/s390/block/dasd_eer.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include diff --git a/drivers/s390/block/dasd_ioctl.c b/drivers/s390/block/dasd_ioctl.c index 3479f8158a1b..1557214944f7 100644 --- a/drivers/s390/block/dasd_ioctl.c +++ b/drivers/s390/block/dasd_ioctl.c @@ -17,6 +17,7 @@ #include #include #include +#include #include #include #include diff --git a/drivers/s390/block/dasd_proc.c b/drivers/s390/block/dasd_proc.c index f13a0bdd148c..2eb025592809 100644 --- a/drivers/s390/block/dasd_proc.c +++ b/drivers/s390/block/dasd_proc.c @@ -14,6 +14,7 @@ #define KMSG_COMPONENT "dasd" #include +#include #include #include #include diff --git a/drivers/s390/block/xpram.c b/drivers/s390/block/xpram.c index 118de392af63..c881a14fa5dd 100644 --- a/drivers/s390/block/xpram.c +++ b/drivers/s390/block/xpram.c @@ -33,7 +33,6 @@ #include /* isdigit, isxdigit */ #include #include -#include #include #include #include /* HDIO_GETGEO */ @@ -41,6 +40,7 @@ #include #include #include +#include #include #define XPRAM_NAME "xpram" -- cgit v1.2.3 From 6a5176c474e3e722ab273d940442238e554e5e58 Mon Sep 17 00:00:00 2001 From: Stefan Haberland Date: Thu, 22 Apr 2010 17:17:02 +0200 Subject: [S390] dasd: fix endless loop in erp If not enough memory is available to build a new erp request it ended up in an endless loop trying to build erp requests. Fixed the loop to proceed the next request instead. Signed-off-by: Stefan Haberland Signed-off-by: Martin Schwidefsky --- drivers/s390/block/dasd.c | 3 ++- drivers/s390/block/dasd_3990_erp.c | 7 ++++++- 2 files changed, 8 insertions(+), 2 deletions(-) (limited to 'drivers/s390/block') diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index bbea90baf98f..acf222f91f5a 100644 --- a/drivers/s390/block/dasd.c +++ b/drivers/s390/block/dasd.c @@ -1899,7 +1899,8 @@ restart: /* Process requests that may be recovered */ if (cqr->status == DASD_CQR_NEED_ERP) { erp_fn = base->discipline->erp_action(cqr); - erp_fn(cqr); + if (IS_ERR(erp_fn(cqr))) + continue; goto restart; } diff --git a/drivers/s390/block/dasd_3990_erp.c b/drivers/s390/block/dasd_3990_erp.c index 6927e751ce3e..6632649dd6aa 100644 --- a/drivers/s390/block/dasd_3990_erp.c +++ b/drivers/s390/block/dasd_3990_erp.c @@ -2309,7 +2309,7 @@ static struct dasd_ccw_req *dasd_3990_erp_add_erp(struct dasd_ccw_req *cqr) cqr->retries); dasd_block_set_timer(device->block, (HZ << 3)); } - return cqr; + return erp; } ccw = cqr->cpaddr; @@ -2372,6 +2372,9 @@ dasd_3990_erp_additional_erp(struct dasd_ccw_req * cqr) /* add erp and initialize with default TIC */ erp = dasd_3990_erp_add_erp(cqr); + if (IS_ERR(erp)) + return erp; + /* inspect sense, determine specific ERP if possible */ if (erp != cqr) { @@ -2711,6 +2714,8 @@ dasd_3990_erp_action(struct dasd_ccw_req * cqr) if (erp == NULL) { /* no matching erp found - set up erp */ erp = dasd_3990_erp_additional_erp(cqr); + if (IS_ERR(erp)) + return erp; } else { /* matching erp found - set all leading erp's to DONE */ erp = dasd_3990_erp_handle_match_erp(cqr, erp); -- cgit v1.2.3