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The mailbox sends a request to the controller and the tx_done callback received for that request clears the active_req pointer. The callback sends the next request in the queue, if there is one. When a controller is busy and cannot accept any more requests until the interrupt is cleared, it would return -EAGAIN. The mailbox controller must unlock its spinlock and retry again. Signed-off-by: Lina Iyer <ilina@codeaurora.org> Change-Id: Id58c7365be8c6bfc7f90fe9445c88c1246d2d7f8 (cherry picked from commit e5c2b83b3daae99cfd3ef55b2c132e8bf4c22b27) Bug: 155339628 Signed-off-by: Will McVicker <willmcvicker@google.com> Signed-off-by: Saravana Kannan <saravanak@google.com> |
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| .. | ||
| arm_mhu.c | ||
| bcm-flexrm-mailbox.c | ||
| bcm-pdc-mailbox.c | ||
| bcm2835-mailbox.c | ||
| hi3660-mailbox.c | ||
| hi6220-mailbox.c | ||
| imx-mailbox.c | ||
| Kconfig | ||
| mailbox-altera.c | ||
| mailbox-sti.c | ||
| mailbox-test.c | ||
| mailbox-xgene-slimpro.c | ||
| mailbox.c | ||
| mailbox.h | ||
| Makefile | ||
| mtk-cmdq-mailbox.c | ||
| omap-mailbox.c | ||
| pcc.c | ||
| pl320-ipc.c | ||
| platform_mhu.c | ||
| qcom-apcs-ipc-mailbox.c | ||
| rockchip-mailbox.c | ||
| stm32-ipcc.c | ||
| tegra-hsp.c | ||
| ti-msgmgr.c | ||