Drivers: hv: vmbus: Rework use of DMA_BIT_MASK(64)
authorMichael Kelley <mikelley@microsoft.com>
Sun, 6 Feb 2022 19:36:56 +0000 (11:36 -0800)
committerWei Liu <wei.liu@kernel.org>
Mon, 7 Feb 2022 17:55:30 +0000 (17:55 +0000)
commit6bf625a4140f24b490766043b307f8252519578b
tree2c7e6d3eb00d586d1d3ddd9b201895960d3d4480
parent8bc69f86328e87a0ffa79438430cc82f3aa6a194
Drivers: hv: vmbus: Rework use of DMA_BIT_MASK(64)

Using DMA_BIT_MASK(64) as an initializer for a global variable
causes problems with Clang 12.0.1. The compiler doesn't understand
that value 64 is excluded from the shift at compile time, resulting
in a build error.

While this is a compiler problem, avoid the issue by setting up
the dma_mask memory as part of struct hv_device, and initialize
it using dma_set_mask().

Reported-by: Nathan Chancellor <nathan@kernel.org>
Reported-by: Vitaly Chikunov <vt@altlinux.org>
Reported-by: Jakub Kicinski <kuba@kernel.org>
Fixes: 743b237c3a7b ("scsi: storvsc: Add Isolation VM support for storvsc driver")
Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/1644176216-12531-1-git-send-email-mikelley@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
drivers/hv/vmbus_drv.c
include/linux/hyperv.h