diff options
Diffstat (limited to 'package/kernel/mac80211/patches/319-0019-brcmfmac-sdio-shorten-retry-loop-in-brcmf_sdio_kso_c.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/319-0019-brcmfmac-sdio-shorten-retry-loop-in-brcmf_sdio_kso_c.patch | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/319-0019-brcmfmac-sdio-shorten-retry-loop-in-brcmf_sdio_kso_c.patch b/package/kernel/mac80211/patches/319-0019-brcmfmac-sdio-shorten-retry-loop-in-brcmf_sdio_kso_c.patch new file mode 100644 index 0000000000..fb78fbe3ce --- /dev/null +++ b/package/kernel/mac80211/patches/319-0019-brcmfmac-sdio-shorten-retry-loop-in-brcmf_sdio_kso_c.patch @@ -0,0 +1,56 @@ +From 5251b6be8bb5c5675bdf12347c7b83937a5c91e5 Mon Sep 17 00:00:00 2001 +From: Arend Van Spriel <arend.vanspriel@broadcom.com> +Date: Mon, 5 Sep 2016 11:42:13 +0100 +Subject: [PATCH] brcmfmac: sdio: shorten retry loop in + brcmf_sdio_kso_control() + +In brcmf_sdio_kso_control() there is a retry loop as hardware may take +time to settle. However, when the call to brcmf_sdiod_regrb() returns +an error it is due to SDIO access failure and it makes no sense to wait +for hardware to settle. This patch aborts the loop after a number of +subsequent access errors. + +Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com> +Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com> +Reviewed-by: Franky Lin <franky.lin@broadcom.com> +Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com> +Signed-off-by: Kalle Valo <kvalo@codeaurora.org> +--- + drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c | 11 +++++++++-- + 1 file changed, 9 insertions(+), 2 deletions(-) + +--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c ++++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c +@@ -313,6 +313,7 @@ struct rte_console { + + #define KSO_WAIT_US 50 + #define MAX_KSO_ATTEMPTS (PMU_MAX_TRANSITION_DLY/KSO_WAIT_US) ++#define BRCMF_SDIO_MAX_ACCESS_ERRORS 5 + + /* + * Conversion of 802.1D priority to precedence level +@@ -677,6 +678,7 @@ brcmf_sdio_kso_control(struct brcmf_sdio + { + u8 wr_val = 0, rd_val, cmp_val, bmask; + int err = 0; ++ int err_cnt = 0; + int try_cnt = 0; + + brcmf_dbg(TRACE, "Enter: on=%d\n", on); +@@ -712,9 +714,14 @@ brcmf_sdio_kso_control(struct brcmf_sdio + */ + rd_val = brcmf_sdiod_regrb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR, + &err); +- if (((rd_val & bmask) == cmp_val) && !err) ++ if (!err) { ++ if ((rd_val & bmask) == cmp_val) ++ break; ++ err_cnt = 0; ++ } ++ /* bail out upon subsequent access errors */ ++ if (err && (err_cnt++ > BRCMF_SDIO_MAX_ACCESS_ERRORS)) + break; +- + udelay(KSO_WAIT_US); + brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR, + wr_val, &err); |