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| author | Otavio Salvador <otavio@ossystems.com.br> | 2022-01-12 07:40:50 -0300 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-01-12 07:40:50 -0300 |
| commit | 712fcc850e5a6d0867b0d97a0b79f1addd01998f (patch) | |
| tree | d092452bebc70059ffa9f913a1daea74d656300e /drivers/pci/pci-bridge-emul.c | |
| parent | e99f775ed2f46b225106f0a156116a0080d16740 (diff) | |
| parent | 0156d956a951c70743d2338132662b29aeb8847d (diff) | |
Merge pull request #517 from denisdrozdov/5.4-2.3.x-imx
Merge tag 'v5.4.161' into 5.4-2.3.x-imx
Diffstat (limited to 'drivers/pci/pci-bridge-emul.c')
| -rw-r--r-- | drivers/pci/pci-bridge-emul.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/pci/pci-bridge-emul.c b/drivers/pci/pci-bridge-emul.c index 06c800595e03..b3d63e319bb3 100644 --- a/drivers/pci/pci-bridge-emul.c +++ b/drivers/pci/pci-bridge-emul.c @@ -432,8 +432,21 @@ int pci_bridge_emul_conf_write(struct pci_bridge_emul *bridge, int where, /* Clear the W1C bits */ new &= ~((value << shift) & (behavior[reg / 4].w1c & mask)); + /* Save the new value with the cleared W1C bits into the cfgspace */ cfgspace[reg / 4] = cpu_to_le32(new); + /* + * Clear the W1C bits not specified by the write mask, so that the + * write_op() does not clear them. + */ + new &= ~(behavior[reg / 4].w1c & ~mask); + + /* + * Set the W1C bits specified by the write mask, so that write_op() + * knows about that they are to be cleared. + */ + new |= (value << shift) & (behavior[reg / 4].w1c & mask); + if (write_op) write_op(bridge, reg, old, new, mask); |