https://github.com/torvalds/linux
Revision 519d8bd4b5d3d82c413eac5bb42b106bb4b9ec15 authored by Yoshihiro Shimoda on 29 August 2016, 09:00:38 UTC, committed by Felipe Balbi on 05 September 2016, 10:39:23 UTC
The previous driver is possible to stop the transfer wrongly.
For example:
1) An interrupt happens, but not BRDY interruption.
2) Read INTSTS0. And than state->intsts0 is not set to BRDY.
3) BRDY is set to 1 here.
4) Read BRDYSTS.
5) Clear the BRDYSTS. And then. the BRDY is cleared wrongly.
Remarks:
- The INTSTS0.BRDY is read only.
- If any bits of BRDYSTS are set to 1, the BRDY is set to 1.
- If BRDYSTS is 0, the BRDY is set to 0.
So, this patch adds condition to avoid such situation. (And about
NRDYSTS, this is not used for now. But, avoiding any side effects,
this patch doesn't touch it.)
Fixes: d5c6a1e024dd ("usb: renesas_usbhs: fixup interrupt status clear method")
Cc: <stable@vger.kernel.org> # v3.8+
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
1 parent 7c113f7
Tip revision: 519d8bd4b5d3d82c413eac5bb42b106bb4b9ec15 authored by Yoshihiro Shimoda on 29 August 2016, 09:00:38 UTC
usb: renesas_usbhs: fix clearing the {BRDY,BEMP}STS condition
usb: renesas_usbhs: fix clearing the {BRDY,BEMP}STS condition
Tip revision: 519d8bd
| File | Mode | Size |
|---|---|---|
| Documentation | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 31 bytes |
| .gitignore | -rw-r--r-- | 1.3 KB |
| .mailmap | -rw-r--r-- | 7.2 KB |
| COPYING | -rw-r--r-- | 18.3 KB |
| CREDITS | -rw-r--r-- | 95.5 KB |
| Kbuild | -rw-r--r-- | 2.8 KB |
| Kconfig | -rw-r--r-- | 252 bytes |
| MAINTAINERS | -rw-r--r-- | 363.1 KB |
| Makefile | -rw-r--r-- | 56.8 KB |
| README | -rw-r--r-- | 18.1 KB |
| REPORTING-BUGS | -rw-r--r-- | 7.3 KB |
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