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FROMGIT: scsi: ufs: exynos: Fix the maximum segment size

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Prepare for enabling DMA clustering and also for supporting PAGE_SIZE !=
4096 by declaring explicitly that the maximum segment size is 4096 bytes
for Exynos UFS host controllers. Add this code in
exynos_ufs_hce_enable_notify() such that it happens after scsi_host_alloc()
and before __scsi_init_queue() is called by the LUN scanning code.

Cc: Alim Akhtar <alim.akhtar@samsung.com>
Cc: Kiwoong Kim <kwmad.kim@samsung.com>
Change-Id: Idce6f25fbe5fccb964d590bbafdcf3d793c0a443
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Tested-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from commit 9a80bc5deb git://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git for-next)
Signed-off-by: Bart Van Assche <bvanassche@google.com>
This commit is contained in:
Bart Van Assche
2023-01-12 15:42:14 -08:00
committed by Bart Van Assche
parent eaebb00d00
commit 1810e7b451
1 changed files with 8 additions and 0 deletions
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8
drivers/ufs/host/ufs-exynos.c
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@@ -1300,6 +1300,14 @@ static int exynos_ufs_hce_enable_notify(struct ufs_hba *hba,
switch (status) {
case PRE_CHANGE:
/*
* The maximum segment size must be set after scsi_host_alloc()
* has been called and before LUN scanning starts
* (ufshcd_async_scan()). Note: this callback may also be called
* from other functions than ufshcd_init().
*/
hba->host->max_segment_size = 4096;
if (ufs->drv_data->pre_hce_enable) {
ret = ufs->drv_data->pre_hce_enable(ufs);
if (ret)