[SCSI] mpt2sas: Fix mismatch in mpt2sas_base_hard_reset_handler() mutex lock-unlock

If ioc->pci_error_recovery is set, goto out in mpt2sas_base_hard_reset_handler()
leads to unlock unheld ioc->reset_in_progress_mutex.

The patch fixes the issue by jumping afer mutex_unlock() call.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Acked-by: "Nandigama, Nagalakshmi" <Nagalakshmi.Nandigama@lsi.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c
index 0b2c955..a78036f 100644 (file)
--- a/drivers/scsi/mpt2sas/mpt2sas_base.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.c
@@ -4548,7 +4548,7 @@ mpt2sas_base_hard_reset_handler(struct MPT2SAS_ADAPTER *ioc, int sleep_flag,
                printk(MPT2SAS_ERR_FMT "%s: pci error recovery reset\n",
                    ioc->name, __func__);
                r = 0;
-               goto out;
+               goto out_unlocked;
        }
 
        if (mpt2sas_fwfault_debug)
@@ -4604,6 +4604,7 @@ mpt2sas_base_hard_reset_handler(struct MPT2SAS_ADAPTER *ioc, int sleep_flag,
        spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
        mutex_unlock(&ioc->reset_in_progress_mutex);
 
+ out_unlocked:
        dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: exit\n", ioc->name,
            __func__));
        return r;