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firmware: arm_ffa: Use the correct buffer size during RXTX_MAP

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Don't use the discovered buffer size from an FFA_FEATURES call directly
since we can run on a system that has the PAGE_SIZE larger than the
returned size which makes the alloc_pages_exact for the buffer to be
rounded up.

Fixes: 61824feae5 ("firmware: arm_ffa: Fetch the Rx/Tx buffer size using ffa_features()")
Signed-off-by: Sebastian Ene <sebastianene@google.com>
Link: https://patch.msgid.link/20260402113939.930221-1-sebastianene@google.com
Signed-off-by: Sudeep Holla <sudeep.holla@kernel.org>
This commit is contained in:
Sebastian Ene
2026-04-02 11:39:39 +00:00
committed by Sudeep Holla
parent 6de23f81a5
commit 83210251fd
1 changed files with 1 additions and 1 deletions
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2
drivers/firmware/arm_ffa/driver.c
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@@ -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;