Yoshihiro Shimoda 538603c602 dmaengine: sh: rcar-dmac: avoid to write CHCR.TE to 1 if TCR is set to 0 ... This patch fixes an issue that unexpected retransfering happens if TCR is set to 0 before rcar_dmac_sync_tcr() writes DE bit to the CHCR register. For example, sh-sci driver can reproduce this issue like below: In rx_timer_fn(): /* CHCR DE bit may be set to 1 */ dmaengine_tx_status() rcar_dmac_tx_status() rcar_dmac_chan_get_residue() rcar_dmac_sync_tcr() /* TCR is possible to be set to 0 */ According to the description of commit 73a47bd0da ("dmaengine: rcar-dmac: use TCRB instead of TCR for residue"), "this buffered data will be transferred if CHCR::DE bit was cleared". So, this patch doesn't need to check TCRB register. Fixes: 73a47bd0da ("dmaengine: rcar-dmac: use TCRB instead of TCR for residue") Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>		2018-07-10 20:49:46 +05:30
..
Kconfig	dmaengine: sh: Use ARCH_RENESAS	2016-02-08 08:48:08 +05:30
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
rcar-dmac.c	dmaengine: sh: rcar-dmac: avoid to write CHCR.TE to 1 if TCR is set to 0	2018-07-10 20:49:46 +05:30
shdma-arm.h	dmaengine: shdma: Use defines instead of hardcoded numbers	2014-07-15 18:02:29 +09:00
shdma-base.c	treewide: kzalloc() -> kcalloc()	2018-06-12 16:19:22 -07:00
shdma-of.c	dmaengine: Remove .owner field for driver	2014-11-06 11:54:18 +05:30
shdma-r8a73a4.c	dmaengine: shdma: r8a73a4: Make dma_ts_shift[] static	2015-05-25 22:33:07 +05:30
shdma.h	dmaengine: sh: Rework Kconfig and Makefile	2014-07-31 17:15:45 +05:30
shdmac.c	dmaengine: shdmac: Change platform check to CONFIG_ARCH_RENESAS	2018-04-25 14:48:30 +05:30
sudmac.c	dmaengine: Remove site specific OOM error messages on kzalloc	2016-06-21 21:35:00 +05:30
usb-dmac.c	treewide: Use struct_size() for kmalloc()-family	2018-06-06 11:15:43 -07:00