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Revert "PCI: Reduce warnings on possible RW1C corruption"

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This reverts commit b097005746.  It breaks
the abi and is not needed by Android devices.

Bug: 161946584
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ie9720e66f0fe39bd640479fc7838cb926883d64e
This commit is contained in:
Greg Kroah-Hartman 2022-04-18 09:59:08 +02:00
parent ce7025b713
commit 34c2fe5da6
2 changed files with 3 additions and 7 deletions
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9
drivers/pci/access.c
View file

@ -160,12 +160,9 @@ int pci_generic_config_write32(struct pci_bus *bus, unsigned int devfn,
* write happen to have any RW1C (write-one-to-clear) bits set, we
* just inadvertently cleared something we shouldn't have.
*/
if (!bus->unsafe_warn) {
dev_warn(&bus->dev, "%d-byte config write to %04x:%02x:%02x.%d offset %#x may corrupt adjacent RW1C bits\n",
size, pci_domain_nr(bus), bus->number,
PCI_SLOT(devfn), PCI_FUNC(devfn), where);
bus->unsafe_warn = 1;
}
dev_warn_ratelimited(&bus->dev, "%d-byte config write to %04x:%02x:%02x.%d offset %#x may corrupt adjacent RW1C bits\n",
size, pci_domain_nr(bus), bus->number,
PCI_SLOT(devfn), PCI_FUNC(devfn), where);
mask = ~(((1 << (size * 8)) - 1) << ((where & 0x3) * 8));
tmp = readl(addr) & mask;

1
include/linux/pci.h
View file

@ -585,7 +585,6 @@ struct pci_bus {
struct bin_attribute *legacy_io; /* Legacy I/O for this bus */
struct bin_attribute *legacy_mem; /* Legacy mem */
unsigned int is_added:1;
unsigned int unsafe_warn:1; /* warned about RW1C config write */
ANDROID_KABI_RESERVE(1);
ANDROID_KABI_RESERVE(2);