A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-30 11:41:38 -04:00
Code Issues Projects Releases Packages Wiki Activity

mmc: block: Don't switch to the same partition type in mmc_blk_remove()

Browse source 
It's pointless to switch and trace partition type if the current
selected device partition is the same with that one. Moreover, cycled
claiming host associated with mmc_blk_part_switch() could make
mmc_blk_remove() end up waiting for grabbing the context if it's
occupied, which lead requests could still hit the low-level drivers,
if an asynchronous unbind for host drivers happened, as the card hasn't
been set removed in the remove path.

So a simple dd in background:
dd if=/dev/mmcblk0 of=/dev/null bs=512k count=100000 &

and doing unbind then:
echo fe320000.dwmmc > /sys/bus/platform/drivers/dwmmc_rockchip/unbind

could make the console stuck for quite a while depending on the
numbers of requests.

Suggested-by: Adrian Hunter <[email protected]>
Signed-off-by: Shawn Lin <[email protected]>
Signed-off-by: Ulf Hansson <[email protected]>
This commit is contained in:
Shawn Lin 2018-05-17 15:47:42 +08:00 • committed by Ulf Hansson
commit 65f9e20e0d
1 changed files with 5 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

8
drivers/mmc/core/block.c
View file

@ -2968,9 +2968,11 @@ static void mmc_blk_remove(struct mmc_card *card)
mmc_blk_remove_debugfs(card, md);
mmc_blk_remove_parts(card, md);
pm_runtime_get_sync(&card->dev);
mmc_claim_host(card->host);
mmc_blk_part_switch(card, md->part_type);
mmc_release_host(card->host);
if (md->part_curr != md->part_type) {
mmc_claim_host(card->host);
mmc_blk_part_switch(card, md->part_type);
mmc_release_host(card->host);
}
if (card->type != MMC_TYPE_SD_COMBO)
pm_runtime_disable(&card->dev);
pm_runtime_put_noidle(&card->dev);