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linux_dsm_epyc7002/drivers
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Douglas Anderson babd183915 usb: dwc2: host: Fix wMaxPacketSize handling (fix webcam regression) 
In commit abb621844f ("usb: ch9: make usb_endpoint_maxp() return
only packet size") the API to usb_endpoint_maxp() changed.  It used to
just return wMaxPacketSize but after that commit it returned
wMaxPacketSize with the high bits (the multiplier) masked off.  If you
wanted to get the multiplier it was now up to your code to call the
new usb_endpoint_maxp_mult() which was introduced in
commit 541b6fe630 ("usb: add helper to extract bits 12:11 of
wMaxPacketSize").

Prior to the API change most host drivers were updated, but no update
was made to dwc2.  Presumably it was assumed that dwc2 was too
simplistic to use the multiplier and thus just didn't support a
certain class of USB devices.  However, it turns out that dwc2 did use
the multiplier and many devices using it were working quite nicely.
That means that many USB devices have been broken since the API
change.  One such device is a Logitech HD Pro Webcam C920.

Specifically, though dwc2 didn't directly call usb_endpoint_maxp(), it
did call usb_maxpacket() which in turn called usb_endpoint_maxp().

Let's update dwc2 to work properly with the new API.

Fixes: abb621844f ("usb: ch9: make usb_endpoint_maxp() return only packet size")
Cc: stable@vger.kernel.org
Acked-by: Minas Harutyunyan <hminas@synopsys.com>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-06-06 13:51:41 +03:00
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accessibility treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 70 2019-05-24 17:36:47 +02:00
acpi Power management fixes for 5.2-rc3 2019-05-31 10:38:35 -07:00
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base More power management updates for 5.2-rc1 2019-05-15 08:46:44 -07:00
bcma
block for-linus-20190601 2019-06-02 09:27:44 -07:00
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crypto crypto: ux500 - fix license comment syntax error 2019-06-01 18:29:58 +02:00
dax libnvdimm fixes v5.2-rc2 2019-05-25 10:11:23 -07:00
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firmware Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-06-02 11:06:13 -07:00
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gpio SPDX update for 5.2-rc3, round 1 2019-05-31 08:34:32 -07:00
gpu SPDX update for 5.2-rc3, round 1 2019-05-31 08:34:32 -07:00
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i2c Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2019-06-02 10:18:11 -07:00
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iio SPDX update for 5.2-rc3, round 1 2019-05-31 08:34:32 -07:00
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iommu drivers/iommu/intel-iommu.c: fix variable 'iommu' set but not used 2019-06-01 15:51:32 -07:00
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isdn SPDX update for 5.2-rc3, round 1 2019-05-31 08:34:32 -07:00
leds LED fix for 5.2-rc3 2019-06-02 10:14:25 -07:00
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nvdimm libnvdimm fixes v5.2-rc2 2019-05-25 10:11:23 -07:00
nvme for-linus-20190524 2019-05-24 16:02:14 -07:00
nvmem treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
of of_net: Fix missing of_find_device_by_node ref count drop 2019-05-13 08:52:37 -07:00
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pci PCI: PM: Avoid possible suspend-to-idle issue 2019-05-27 10:55:08 +02:00
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scsi SCSI fixes on 20190601 2019-06-02 09:26:34 -07:00
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staging Staging/IIO driver fixes for 5.2-rc3 2019-05-31 08:31:45 -07:00
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thermal Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal 2019-06-02 10:16:09 -07:00
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usb usb: dwc2: host: Fix wMaxPacketSize handling (fix webcam regression) 2019-06-06 13:51:41 +03:00
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video SPDX update for 5.2-rc3, round 1 2019-05-31 08:34:32 -07:00
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xen xen: fixes for 5.2-rc3 2019-05-31 10:53:34 -07:00
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