Commit 9a80bc5d authored by Bart Van Assche's avatar Bart Van Assche Committed by Martin K. Petersen
Browse files

scsi: ufs: exynos: Fix the maximum segment size 



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>
Signed-off-by: default avatarBart Van Assche <bvanassche@acm.org>
Reviewed-by: default avatarAlim Akhtar <alim.akhtar@samsung.com>
Tested-by: default avatarAlim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 86bd0c4a

drivers/ufs/host/ufs-exynos.c

+8 −0
Original line number Diff line number Diff line
@@ -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)