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authorVishal Kulkarni <vishal@chelsio.com>2019-10-30 20:17:57 +0530
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-11-10 11:34:30 +0100
commit7e3c49ad1da9ebd761c6c6654743088f2fef9aab (patch)
tree6449d673c038f36086a353689011d42bb9a6a8b2 /drivers
parent0776cc4bf978d16a3c4b562d1cff5a20777e3329 (diff)
cxgb4: fix panic when attaching to ULD fail
[ Upstream commit fc89cc358fb64e2429aeae0f37906126636507ec ] Release resources when attaching to ULD fail. Otherwise, data mismatch is seen between LLD and ULD later on, which lead to kernel panic when accessing resources that should not even exist in the first place. Fixes: 94cdb8bb993a ("cxgb4: Add support for dynamic allocation of resources for ULD") Signed-off-by: Shahjada Abul Husain <shahjada@chelsio.com> Signed-off-by: Vishal Kulkarni <vishal@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.c28
1 files changed, 16 insertions, 12 deletions
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.c
index a4dead4ab0ed..86b528d8364c 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.c
@@ -695,10 +695,10 @@ static void uld_init(struct adapter *adap, struct cxgb4_lld_info *lld)
lld->write_cmpl_support = adap->params.write_cmpl_support;
}
-static void uld_attach(struct adapter *adap, unsigned int uld)
+static int uld_attach(struct adapter *adap, unsigned int uld)
{
- void *handle;
struct cxgb4_lld_info lli;
+ void *handle;
uld_init(adap, &lli);
uld_queue_init(adap, uld, &lli);
@@ -708,7 +708,7 @@ static void uld_attach(struct adapter *adap, unsigned int uld)
dev_warn(adap->pdev_dev,
"could not attach to the %s driver, error %ld\n",
adap->uld[uld].name, PTR_ERR(handle));
- return;
+ return PTR_ERR(handle);
}
adap->uld[uld].handle = handle;
@@ -716,22 +716,22 @@ static void uld_attach(struct adapter *adap, unsigned int uld)
if (adap->flags & CXGB4_FULL_INIT_DONE)
adap->uld[uld].state_change(handle, CXGB4_STATE_UP);
+
+ return 0;
}
-/**
- * cxgb4_register_uld - register an upper-layer driver
- * @type: the ULD type
- * @p: the ULD methods
+/* cxgb4_register_uld - register an upper-layer driver
+ * @type: the ULD type
+ * @p: the ULD methods
*
- * Registers an upper-layer driver with this driver and notifies the ULD
- * about any presently available devices that support its type. Returns
- * %-EBUSY if a ULD of the same type is already registered.
+ * Registers an upper-layer driver with this driver and notifies the ULD
+ * about any presently available devices that support its type.
*/
void cxgb4_register_uld(enum cxgb4_uld type,
const struct cxgb4_uld_info *p)
{
- int ret = 0;
struct adapter *adap;
+ int ret = 0;
if (type >= CXGB4_ULD_MAX)
return;
@@ -763,8 +763,12 @@ void cxgb4_register_uld(enum cxgb4_uld type,
if (ret)
goto free_irq;
adap->uld[type] = *p;
- uld_attach(adap, type);
+ ret = uld_attach(adap, type);
+ if (ret)
+ goto free_txq;
continue;
+free_txq:
+ release_sge_txq_uld(adap, type);
free_irq:
if (adap->flags & CXGB4_FULL_INIT_DONE)
quiesce_rx_uld(adap, type);