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authorKai-Heng Feng <kai.heng.feng@canonical.com>2020-09-25 16:49:51 +0800
committerUlf Hansson <ulf.hansson@linaro.org>2020-09-28 12:16:13 +0200
commit62c59a8786e6bb75569cee91dab66e9da3ff4b68 (patch)
tree4244bf7dba14ecfe300da986c6e59ba19f39d748 /drivers/memstick
parent14801c624066a55139c2c57963eb1b859d0a316a (diff)
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memstick: Skip allocating card when removing host
After commit 6827ca573c03 ("memstick: rtsx_usb_ms: Support runtime power management"), removing module rtsx_usb_ms will be stuck. The deadlock is caused by powering on and powering off at the same time, the former one is when memstick_check() is flushed, and the later is called by memstick_remove_host(). Soe let's skip allocating card to prevent this issue. Fixes: 6827ca573c03 ("memstick: rtsx_usb_ms: Support runtime power management") Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Link: https://lore.kernel.org/r/20200925084952.13220-1-kai.heng.feng@canonical.com Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/memstick')
-rw-r--r--drivers/memstick/core/memstick.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/memstick/core/memstick.c b/drivers/memstick/core/memstick.c
index 693ee73eb291..ef03d6fafc5c 100644
--- a/drivers/memstick/core/memstick.c
+++ b/drivers/memstick/core/memstick.c
@@ -441,6 +441,9 @@ static void memstick_check(struct work_struct *work)
} else if (host->card->stop)
host->card->stop(host->card);
+ if (host->removing)
+ goto out_power_off;
+
card = memstick_alloc_card(host);
if (!card) {
@@ -545,6 +548,7 @@ EXPORT_SYMBOL(memstick_add_host);
*/
void memstick_remove_host(struct memstick_host *host)
{
+ host->removing = 1;
flush_workqueue(workqueue);
mutex_lock(&host->lock);
if (host->card)