]> git.baikalelectronics.ru Git - kernel.git/commit
net: qla3xxx: Eliminate duplicate barriers on weakly-ordered archs
authorSinan Kaya <okaya@codeaurora.org>
Sun, 25 Mar 2018 14:39:15 +0000 (10:39 -0400)
committerDavid S. Miller <davem@davemloft.net>
Mon, 26 Mar 2018 16:47:55 +0000 (12:47 -0400)
commit6edcd05fa5b876c7e39f823c7e410228a86d829e
tree23e2ebcebaba2d72a4aa0be225eaed147658a741
parentfccd6ed8614a47e98ec1c34dc4863c9366270544
net: qla3xxx: Eliminate duplicate barriers on weakly-ordered archs

Code includes wmb() followed by writel(). writel() already has a
barrier on some architectures like arm64.

This ends up CPU observing two barriers back to back before executing
the register write.

Since code already has an explicit barrier call, changing code to

wmb()
writel_relaxed()
mmiowb()

for multi-arch support.

Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/ethernet/qlogic/qla3xxx.c