From 4bc6b63482a069baa2eeaba3e4a0b5df75263dc5 Mon Sep 17 00:00:00 2001 From: "Ewan D. Milne" Date: Thu, 4 Dec 2014 11:49:26 -0500 Subject: [PATCH] scsi_debug: take sdebug_host_list_lock when changing capacity All other traversals of the sdebug_host_list take the lock. Signed-off-by: Ewan D. Milne Acked-by: Douglas Gilbert Signed-off-by: Christoph Hellwig --- drivers/scsi/scsi_debug.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index 2e32a4c09fbc..0d0e0593e3c5 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -4438,6 +4438,7 @@ static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf, struct sdebug_host_info *sdhp; struct sdebug_dev_info *dp; + spin_lock(&sdebug_host_list_lock); list_for_each_entry(sdhp, &sdebug_host_list, host_list) { list_for_each_entry(dp, &sdhp->dev_info_list, @@ -4446,6 +4447,7 @@ static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf, dp->uas_bm); } } + spin_unlock(&sdebug_host_list_lock); } return count; }