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Arm FF-A fix for v7.1

Browse Source 
Use the page aligned backing allocation size when computing the RXTX_MAP
 page count. This fixes FF-A RX/TX buffer registration on kernels built
 with 16K/64K PAGE_SIZE, where alloc_pages_exact() backs the buffer with a
 larger aligned span than the discovered minimum buffer size.
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Merge tag 'ffa-fix-7.1' of https://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into soc/drivers

Arm FF-A fix for v7.1

Use the page aligned backing allocation size when computing the RXTX_MAP
page count. This fixes FF-A RX/TX buffer registration on kernels built
with 16K/64K PAGE_SIZE, where alloc_pages_exact() backs the buffer with a
larger aligned span than the discovered minimum buffer size.

* tag 'ffa-fix-7.1' of https://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux:
  firmware: arm_ffa: Use the correct buffer size during RXTX_MAP

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
This commit is contained in:
Krzysztof Kozlowski 2026-04-11 10:48:50 +02:00
commit 33a20cdaf4
1 changed files with 1 additions and 1 deletions
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2
drivers/firmware/arm_ffa/driver.c
View File

@ -2078,7 +2078,7 @@ static int __init ffa_init(void)
ret = ffa_rxtx_map(virt_to_phys(drv_info->tx_buffer),
virt_to_phys(drv_info->rx_buffer),
rxtx_bufsz / FFA_PAGE_SIZE);
PAGE_ALIGN(rxtx_bufsz) / FFA_PAGE_SIZE);
if (ret) {
pr_err("failed to register FFA RxTx buffers\n");
goto free_pages;