diff options
| author | Roger Quadros <rogerq@ti.com> | 2014-04-01 17:26:40 +0300 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2014-04-02 15:44:40 -0400 |
| commit | 3f62971162370213271dc1e7a396b6b3a6d5b6c6 (patch) | |
| tree | a2702d6abcf36219d1688aa5313af5fe07b42f6d | |
| parent | 1336e2d343f088b71ec71907855caccd1053d166 (diff) | |
ahci: Fix data abort on multiple scsi resets.
Commit 2faf5fb82ed6 introduced a regression that causes a data
abort when running scsi init followed by scsi reset.
There are 2 problems with the original commit
1) ALLOC_CACHE_ALIGN_BUFFER() allocates memory on the stack but is
assigned to ataid[port] and used by other functions.
2) The function ata_scsiop_inquiry() tries to free memory which was
never allocated on the heap.
Fix these problems by using tmpid as a temporary cache aligned buffer.
Allocate memory separately for ataid[port] and re-use it if required.
Fixes: 2faf5fb82ed6 (ahci: Fix cache align error messages)
Reported-by: Eli Nidam <elini@marvell.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
| -rw-r--r-- | drivers/block/ahci.c | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/drivers/block/ahci.c b/drivers/block/ahci.c index a409f637704..c8f65739e97 100644 --- a/drivers/block/ahci.c +++ b/drivers/block/ahci.c @@ -623,6 +623,7 @@ static int ata_scsiop_inquiry(ccb *pccb) 95 - 4, }; u8 fis[20]; + u16 *idbuf; ALLOC_CACHE_ALIGN_BUFFER(u16, tmpid, ATA_ID_WORDS); u8 port; @@ -649,17 +650,25 @@ static int ata_scsiop_inquiry(ccb *pccb) return -EIO; } - if (ataid[port]) - free(ataid[port]); - ataid[port] = tmpid; - ata_swap_buf_le16(tmpid, ATA_ID_WORDS); + if (!ataid[port]) { + ataid[port] = malloc(ATA_ID_WORDS * 2); + if (!ataid[port]) { + printf("%s: No memory for ataid[port]\n", __func__); + return -ENOMEM; + } + } + + idbuf = ataid[port]; + + memcpy(idbuf, tmpid, ATA_ID_WORDS * 2); + ata_swap_buf_le16(idbuf, ATA_ID_WORDS); memcpy(&pccb->pdata[8], "ATA ", 8); - ata_id_strcpy((u16 *) &pccb->pdata[16], &tmpid[ATA_ID_PROD], 16); - ata_id_strcpy((u16 *) &pccb->pdata[32], &tmpid[ATA_ID_FW_REV], 4); + ata_id_strcpy((u16 *)&pccb->pdata[16], &idbuf[ATA_ID_PROD], 16); + ata_id_strcpy((u16 *)&pccb->pdata[32], &idbuf[ATA_ID_FW_REV], 4); #ifdef DEBUG - ata_dump_id(tmpid); + ata_dump_id(idbuf); #endif return 0; } |