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sbi: mpxy: define INVALID_ADDR using unsigned long width

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INVALID_ADDR is used as an all-ones physical address sentinel.
Using -1U only guarantees 32-bit width, so on platforms where
unsigned long is wider it may not expand to all ones after assignment.

Use -1UL so the conversion to unsigned long preserves an all-ones
bit pattern across supported widths.

Fixes: 7939bf1329 ("lib: sbi: Add SBI Message Proxy (MPXY) framework")
Signed-off-by: Himanshu Chauhan <himanshu.chauhan@oss.qualcomm.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20260521052838.2174588-1-himanshu.chauhan@oss.qualcomm.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Himanshu Chauhan
2026-05-21 10:58:38 +05:30
committed by Anup Patel
parent f36acaeb80
commit e92c8fd083
1 changed files with 1 additions and 1 deletions
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lib/sbi/sbi_mpxy.c
+1 -1
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@@ -28,7 +28,7 @@ static unsigned long mpxy_shmem_size = PAGE_SIZE;
static SBI_LIST_HEAD(mpxy_channel_list);
/** Invalid Physical Address(all bits 1) */
#define INVALID_ADDR (-1U)
#define INVALID_ADDR (-1UL)
/** MPXY Attribute size in bytes */
#define ATTR_SIZE (4)