diff options
author | John Keeping <john@metanate.com> | 2022-09-15 18:56:56 +0100 |
---|---|---|
committer | Jaehoon Chung <jh80.chung@samsung.com> | 2022-10-24 18:02:41 +0900 |
commit | 7ff2f30b63947ffe4e707bbe4b94143e947fce35 (patch) | |
tree | f2d31cb0ff3a3fdefc553f31758ad1cf96e18660 /drivers/ddr/imx/imx8m/ddr_init.c | |
parent | 359c176de550be54805e762d296a9fec3dc24d63 (diff) |
mmc: dwmmc: only clear handled interrupts
Unconditionally clearing DTO when RXDR is set leads to spurious timeouts
in FIFO mode transfers if events occur in the following order:
mask = dwmci_readl(host, DWMCI_RINTSTS);
// Hardware asserts DWMCI_INTMSK_DTO here
dwmci_writel(host, DWMCI_RINTSTS, DWMCI_INTMSK_DTO);
if (mask & DWMCI_INTMSK_DTO) {
// Unreachable as DTO is cleared without being handled!
return 0;
}
Only clear interrupts that we have seen and are handling so that DTO is
not missed.
Signed-off-by: John Keeping <john@metanate.com>
Tested-by: Jerome Forissier <jerome.forissier@linaro.org> (Rock PI 4B)
Tested-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Diffstat (limited to 'drivers/ddr/imx/imx8m/ddr_init.c')
0 files changed, 0 insertions, 0 deletions