From: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
To: Felipe Balbi <balbi@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>,
linux-usb@vger.kernel.org
Cc: John Youn <John.Youn@synopsys.com>,
Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Subject: [PATCH v2] usb: dwc2: gadget: Fix ISOC transfer complete handling for DDMA
Date: Sat, 11 Sep 2021 22:58:30 +0400 [thread overview]
Message-ID: <a36981accc26cd674c5d8f8da6164344b94ec1fe.1631386531.git.Minas.Harutyunyan@synopsys.com> (raw)
When last descriptor in a descriptor list completed with XferComplete
interrupt, core switching to handle next descriptor and assert BNA
interrupt. Both these interrupts are set while dwc2_hsotg_epint()
handler called. Each interrupt should be handled separately: first
XferComplete interrupt then BNA interrupt, otherwise last completed
transfer will not be giveback to function driver as completed
request.
Fixes: 729cac693eec ("usb: dwc2: Change ISOC DDMA flow")
Signed-off-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
---
Changes in v2:
- Fix typo in commit message
drivers/usb/dwc2/gadget.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index f09cbdfac9df..11d85a6e0b0d 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -3067,9 +3067,7 @@ static void dwc2_hsotg_epint(struct dwc2_hsotg *hsotg, unsigned int idx,
/* In DDMA handle isochronous requests separately */
if (using_desc_dma(hsotg) && hs_ep->isochronous) {
- /* XferCompl set along with BNA */
- if (!(ints & DXEPINT_BNAINTR))
- dwc2_gadget_complete_isoc_request_ddma(hs_ep);
+ dwc2_gadget_complete_isoc_request_ddma(hs_ep);
} else if (dir_in) {
/*
* We get OutDone from the FIFO, so we only
base-commit: 353f497ca8c913cd25ae06c7f94e3b0ff4124dd8
--
2.11.0
reply other threads:[~2021-09-11 18:58 UTC|newest]
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