Commit 83210251 authored by Sebastian Ene's avatar Sebastian Ene Committed by Sudeep Holla
Browse files

firmware: arm_ffa: Use the correct buffer size during RXTX_MAP 



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: 61824fea ("firmware: arm_ffa: Fetch the Rx/Tx buffer size using ffa_features()")
Signed-off-by: default avatarSebastian Ene <sebastianene@google.com>
Link: https://patch.msgid.link/20260402113939.930221-1-sebastianene@google.com


Signed-off-by: default avatarSudeep Holla <sudeep.holla@kernel.org>
parent 6de23f81

drivers/firmware/arm_ffa/driver.c

+1 −1
Original line number Diff line number Diff line
@@ -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;