Vidya Sagar
caf4a67c01
PCI/MSI: Prevent MSI hardware interrupt number truncation ...
commit db744ddd59be798c2627efbfc71f707f5a935a40 upstream.
While calculating the hardware interrupt number for a MSI interrupt, the
higher bits (i.e. from bit-5 onwards a.k.a domain_nr >= 32) of the PCI
domain number gets truncated because of the shifted value casting to return
type of pci_domain_nr() which is 'int'. This for example is resulting in
same hardware interrupt number for devices 0019:00:00.0 and 0039:00:00.0.
To address this cast the PCI domain number to 'irq_hw_number_t' before left
shifting it to calculate the hardware interrupt number.
Please note that this fixes the issue only on 64-bit systems and doesn't
change the behavior for 32-bit systems i.e. the 32-bit systems continue to
have the issue. Since the issue surfaces only if there are too many PCIe
controllers in the system which usually is the case in modern server
systems and they don't tend to run 32-bit kernels.
Fixes: 3878eaefb8stable@vger.kernel.org
Link: https://lore.kernel.org/r/20240115135649.708536-1-vidyas@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-03-01 13:13:36 +01:00
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Revert "Revert "mtd: rawnand: gpmi: Fix setting busy timeout setting""
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PCI/MSI: Prevent MSI hardware interrupt number truncation
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caf4a67c01