From: Raj Kumar Bhagat <raj.bhagat@oss.qualcomm.com>
To: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>,
jjohnson@kernel.org
Cc: linux-wireless@vger.kernel.org, ath12k@lists.infradead.org,
ath11k@lists.infradead.org, linux-kernel@vger.kernel.org,
mani@kernel.org, Alex Williamson <alex@shazbot.org>
Subject: Re: [PATCH 1/2] wifi: ath11k: Flush the posted write after writing to PCIE_SOC_GLOBAL_RESET
Date: Tue, 30 Jun 2026 15:15:50 +0530 [thread overview]
Message-ID: <eee587a3-2264-4e85-9014-c230988de6db@oss.qualcomm.com> (raw)
In-Reply-To: <20260623141649.41087-1-manivannan.sadhasivam@oss.qualcomm.com>
On 23-06-2026 19:46, Manivannan Sadhasivam wrote:
> ath11k_pci_soc_global_reset() tries to reset the device by writing to the
> PCIE_SOC_GLOBAL_RESET register. But it doesn't do a read-back to ensure
> that the write gets flushed to the device before the delay.
>
> This may lead to the delay on the host to be insufficient, if the posted
> write doesn't reach the device before the delay.
>
> So add a read-back after writing to the PCIE_SOC_GLOBAL_RESET register and
> before the delay.
>
> Compile tested only.
>
> Fixes: f3c603d412b3 ("ath11k: reset MHI during power down and power up")
> Reported-by: Alex Williamson<alex@shazbot.org>
> Closes:https://lore.kernel.org/linux-pci/20260622160822.09350246@shazbot.org
> Signed-off-by: Manivannan Sadhasivam<manivannan.sadhasivam@oss.qualcomm.com>
> ---
> drivers/net/wireless/ath/ath11k/pci.c | 4 ++++
> 1 file changed, 4 insertions(+)
Reviewed-by: Raj Kumar Bhagat <raj.bhagat@oss.qualcomm.com>
next prev parent reply other threads:[~2026-06-30 9:45 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-23 14:16 [PATCH 1/2] wifi: ath11k: Flush the posted write after writing to PCIE_SOC_GLOBAL_RESET Manivannan Sadhasivam
2026-06-23 14:16 ` [PATCH 2/2] wifi: ath12k: " Manivannan Sadhasivam
2026-06-30 9:43 ` Raj Kumar Bhagat
2026-06-30 9:54 ` Raj Kumar Bhagat
2026-07-03 7:03 ` Baochen Qiang
2026-06-30 9:45 ` Raj Kumar Bhagat [this message]
2026-07-03 7:03 ` [PATCH 1/2] wifi: ath11k: " Baochen Qiang
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