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b=g3cT0H2U+Hme5Zntkb+WFo47jcLAzO65povrePpKs5MY9UCFZYnRAu4ZfD3JCtpMbyHLoN5WimKOZoybwmWgLJIPLly/BAr8KClqJjsWFEMWtJoN5/OuUqxNrcEQKb6vJv/KnPF24aeh7xJzno9LIWUq0a8h4mdDd+Wy0++nLiw= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=amd.com; Received: from LV5PR12MB9779.namprd12.prod.outlook.com (2603:10b6:408:301::14) by DM4PR12MB7645.namprd12.prod.outlook.com (2603:10b6:8:107::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.315.12; Tue, 11 Aug 2026 14:21:21 +0000 Received: from LV5PR12MB9779.namprd12.prod.outlook.com ([fe80::8ac8:e862:8ae9:9287]) by LV5PR12MB9779.namprd12.prod.outlook.com ([fe80::8ac8:e862:8ae9:9287%5]) with mapi id 15.21.0292.024; Tue, 11 Aug 2026 14:21:21 +0000 Message-ID: <7468b060-161b-4489-b876-4448bdeaf184@amd.com> Date: Tue, 11 Aug 2026 16:21:14 +0200 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] ASoC: xilinx: formatter_pcm: clear stream pointers on close To: Rosen Penev , linux-sound@vger.kernel.org Cc: Vincenzo Frascino , Liam Girdwood , Mark Brown , Jaroslav Kysela , Takashi Iwai , "moderated list:ARM/ZYNQ ARCHITECTURE" , open list , "Dhanunjanrao, Katta" References: <20260807002056.42953-1-rosenp@gmail.com> Content-Language: en-US From: Michal Simek Autocrypt: addr=michal.simek@amd.com; keydata= xsFNBFFuvDEBEAC9Amu3nk79+J+4xBOuM5XmDmljuukOc6mKB5bBYOa4SrWJZTjeGRf52VMc howHe8Y9nSbG92obZMqsdt+d/hmRu3fgwRYiiU97YJjUkCN5paHXyBb+3IdrLNGt8I7C9RMy svSoH4WcApYNqvB3rcMtJIna+HUhx8xOk+XCfyKJDnrSuKgx0Svj446qgM5fe7RyFOlGX/wF Ae63Hs0RkFo3I/+hLLJP6kwPnOEo3lkvzm3FMMy0D9VxT9e6Y3afe1UTQuhkg8PbABxhowzj SEnl0ICoqpBqqROV/w1fOlPrm4WSNlZJunYV4gTEustZf8j9FWncn3QzRhnQOSuzTPFbsbH5 WVxwDvgHLRTmBuMw1sqvCc7CofjsD1XM9bP3HOBwCxKaTyOxbPJh3D4AdD1u+cF/lj9Fj255 Es9aATHPvoDQmOzyyRNTQzupN8UtZ+/tB4mhgxWzorpbdItaSXWgdDPDtssJIC+d5+hskys8 B3jbv86lyM+4jh2URpnL1gqOPwnaf1zm/7sqoN3r64cml94q68jfY4lNTwjA/SnaS1DE9XXa XQlkhHgjSLyRjjsMsz+2A4otRLrBbumEUtSMlPfhTi8xUsj9ZfPIUz3fji8vmxZG/Da6jx/c a0UQdFFCL4Ay/EMSoGbQouzhC69OQLWNH3rMQbBvrRbiMJbEZwARAQABzSlNaWNoYWwgU2lt ZWsgKEFNRCkgPG1pY2hhbC5zaW1la0BhbWQuY29tPsLBlAQTAQgAPgIbAwULCQgHAgYVCgkI CwIEFgIDAQIeAQIXgBYhBGc1DJv1zO6bU2Q1ajd8fyH+PR+RBQJn8lwDBQkaRgbLAAoJEDd8 fyH+PR+RCNAP/iHkKbpP0XXfgfWqf8yyrFHjGPJSknERzxw0glxPztfC3UqeusQ0CPnbI85n uQdm5/zRgWr7wi8H2UMqFlfMW8/NH5Da7GOPc26NMTPA2ZG5S2SG2SGZj1Smq8mL4iueePiN x1qfWhVm7TfkDHUEmMAYq70sjFcvygyqHUCumpw36CMQSMyrxyEkbYm1NKORlnySAFHy2pOx nmXKSaL1yfof3JJLwNwtaBj76GKQILnlYx9QNnt6adCtrZLIhB3HGh4IRJyuiiM0aZi1G8ei 2ILx2n2LxUw7X6aAD0sYHtNKUCQMCBGQHzJLDYjEyy0kfYoLXV2P6K+7WYnRP+uV8g77Gl9a IuGvxgEUITjMakX3e8RjyZ5jmc5ZAsegfJ669oZJOzQouw/W9Qneb820rhA2CKK8BnmlkHP+ WB5yDks3gSHE/GlOWqRkVZ05sUjVmq/tZ1JEdOapWQovRQsueDjxXcMjgNo5e8ttCyMo44u1 pKXRJpR5l7/hBYWeMlcKvLwByep+FOGtKsv0xadMKr1M6wPZXkV83jMKxxRE9HlqWJLLUE1Q 0pDvn1EvlpDj9eED73iMBsrHu9cIk8aweTEbQ4bcKRGfGkXrCwle6xRiKSjXCdzWpOglNhjq 1g8Ak+G+ZR6r7QarL01BkdE2/WUOLHdGHB1hJxARbP2E3l46zsFNBFFuvDEBEACXqiX5h4IA 03fJOwh+82aQWeHVAEDpjDzK5hSSJZDE55KP8br1FZrgrjvQ9Ma7thSu1mbr+ydeIqoO1/iM fZA+DDPpvo6kscjep11bNhVa0JpHhwnMfHNTSHDMq9OXL9ZZpku/+OXtapISzIH336p4ZUUB 5asad8Ux70g4gmI92eLWBzFFdlyR4g1Vis511Nn481lsDO9LZhKyWelbif7FKKv4p3FRPSbB vEgh71V3NDCPlJJoiHiYaS8IN3uasV/S1+cxVbwz2WcUEZCpeHcY2qsQAEqp4GM7PF2G6gtz IOBUMk7fjku1mzlx4zP7uj87LGJTOAxQUJ1HHlx3Li+xu2oF9Vv101/fsCmptAAUMo7KiJgP Lu8TsP1migoOoSbGUMR0jQpUcKF2L2jaNVS6updvNjbRmFojK2y6A/Bc6WAKhtdv8/e0/Zby iVA7/EN5phZ1GugMJxOLHJ1eqw7DQ5CHcSQ5bOx0Yjmhg4PT6pbW3mB1w+ClAnxhAbyMsfBn XxvvcjWIPnBVlB2Z0YH/gizMDdM0Sa/HIz+q7JR7XkGL4MYeAM15m6O7hkCJcoFV7LMzkNKk OiCZ3E0JYDsMXvmh3S4EVWAG+buA+9beElCmXDcXPI4PinMPqpwmLNcEhPVMQfvAYRqQp2fg 1vTEyK58Ms+0a9L1k5MvvbFg9QARAQABwsF8BBgBCAAmAhsMFiEEZzUMm/XM7ptTZDVqN3x/ If49H5EFAmfyXCkFCRpGBvgACgkQN3x/If49H5GY5xAAoKWHRO/OlI7eMA8VaUgFInmphBAj fAgQbW6Zxl9ULaCcNSoJc2D0zYWXftDOJeXyVk5Gb8cMbLA1tIMSM/BgSAnT7As2KfcZDTXQ DJSZYWgYKc/YywLgUlpv4slFv5tjmoUvHK9w2DuFLW254pnUuhrdyTEaknEM+qOmPscWOs0R dR6mMTN0vBjnLUeYdy0xbaoefjT+tWBybXkVwLDd3d/+mOa9ZiAB7ynuVWu2ow/uGJx0hnRI LGfLsiPu47YQrQXu79r7RtVeAYwRh3ul7wx5LABWI6n31oEHxDH+1czVjKsiozRstEaUxuDZ jWRHq+AEIq79BTTopj2dnW+sZAsnVpQmc+nod6xR907pzt/HZL0WoWwRVkbg7hqtzKOBoju3 hftqVr0nx77oBZD6mSJsxM/QuJoaXaTX/a/QiB4Nwrja2jlM0lMUA/bGeM1tQwS7rJLaT3cT RBGSlJgyWtR8IQvX3rqHd6QrFi1poQ1/wpLummWO0adWes2U6I3GtD9vxO/cazWrWBDoQ8Da otYa9+7v0j0WOBTJaj16LFxdSRq/jZ1y/EIHs3Ysd85mUWXOB8xZ6h+WEMzqAvOt02oWJVbr ZLqxG/3ScDXZEUJ6EDJVoLAK50zMk87ece2+4GWGOKfFsiDfh7fnEMXQcykxuowBYUD0tMd2 mpwx1d8= In-Reply-To: <20260807002056.42953-1-rosenp@gmail.com> Content-Type: text/plain; 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A subsequent interrupt then > dereferences the dangling substream pointer and calls > snd_pcm_period_elapsed() on a closed stream whose runtime has already > been freed, causing a WARN_ON or crash. Since the IRQ is never > disabled, this repeats on every interrupt. > > Disable the IRQs before resetting the formatter, and clear the stream > pointers in close so the IRQ handlers' NULL checks catch straggler > interrupts. Do the cleanup even when the reset fails. > > Fixes: 6f6c3c36f091 ("ASoC: xlnx: add pcm formatter platform driver") > Assisted-by: opencode:deepseek-v4-flash-free > Signed-off-by: Rosen Penev > --- > sound/soc/xilinx/xlnx_formatter_pcm.c | 14 +++++++++----- > 1 file changed, 9 insertions(+), 5 deletions(-) > > diff --git a/sound/soc/xilinx/xlnx_formatter_pcm.c b/sound/soc/xilinx/xlnx_formatter_pcm.c > index 7eba3a0205f1..e1d2f1cadf8d 100644 > --- a/sound/soc/xilinx/xlnx_formatter_pcm.c > +++ b/sound/soc/xilinx/xlnx_formatter_pcm.c > @@ -421,15 +421,19 @@ static int xlnx_formatter_pcm_close(struct snd_soc_component *component, > int ret; > struct xlnx_pcm_stream_param *stream_data = > substream->runtime->private_data; > + struct xlnx_pcm_drv_data *adata = dev_get_drvdata(component->dev); > + > + xlnx_formatter_disable_irqs(stream_data->mmio, substream->stream); > + > + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) > + adata->play_stream = NULL; > + else > + adata->capture_stream = NULL; > > ret = xlnx_formatter_pcm_reset(stream_data->mmio); > - if (ret) { > + if (ret) > dev_err(component->dev, "audio formatter reset failed\n"); > - goto err_reset; > - } > - xlnx_formatter_disable_irqs(stream_data->mmio, substream->stream); > > -err_reset: > kfree(stream_data); > return 0; > } I am not convinced that this is correct. Based on https://docs.amd.com/r/en-US/pg330-audio-formatter/S2MM-Control-Register-0x10 when you trigger reset (bit 1) "After completion of a soft reset, all registers and bits are in the Reset State." Default value for BIT 13 (AUD_CTRL_IOC_IRQ_MASK) is 1. It means after your change interrupt on completion is enabled not disabled. Katta: Can you please confirm it? Rosen: Did you test this on HW? Thanks, Michal