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cxl: use correct operator when writing pcie config space values

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commit 48f0f6b717 upstream.

When writing a value to config space, cxl_pcie_write_config() calls
cxl_pcie_config_info() to obtain a mask and shift value, shifts the new
value accordingly, then uses the mask to combine the shifted value with the
existing value at the address as part of a read-modify-write pattern.

Currently, we use a logical OR operator rather than a bitwise OR operator,
which means any use of this function results in an incorrect value being
written. Replace the logical OR operator with a bitwise OR operator so the
value is written correctly.

Reported-by: Michael Ellerman <mpe@ellerman.id.au>
Fixes: 6f7f0b3df6 ("cxl: Add AFU virtual PHB and kernel API")
Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andrew Donnellan
2015-11-04 13:24:09 +11:00
committed by Greg Kroah-Hartman
parent a0b1c2d0f5
commit e3d4bcc39f
1 changed files with 1 additions and 1 deletions
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2
drivers/misc/cxl/vphb.c
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@@ -203,7 +203,7 @@ static int cxl_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
mask <<= shift;
val <<= shift;
v = (in_le32(ioaddr) & ~mask) || (val & mask);
v = (in_le32(ioaddr) & ~mask) | (val & mask);
out_le32(ioaddr, v);
return PCIBIOS_SUCCESSFUL;