Patch "bus: ti-sysc: Use fsleep() instead of usleep_range() in sysc_reset()" has been added to the 5.10-stable tree

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This is a note to let you know that I've just added the patch titled

    bus: ti-sysc: Use fsleep() instead of usleep_range() in sysc_reset()

to the 5.10-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     bus-ti-sysc-use-fsleep-instead-of-usleep_range-in-sy.patch
and it can be found in the queue-5.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit d17c5a78fdfed3ec3888b4730e290207759ddeed
Author: Julien Panis <jpanis@xxxxxxxxxxxx>
Date:   Mon Aug 21 16:24:18 2023 +0200

    bus: ti-sysc: Use fsleep() instead of usleep_range() in sysc_reset()
    
    [ Upstream commit d929b2b7464f95ec01e47f560b1e687482ba8929 ]
    
    The am335x-evm started producing boot errors because of subtle timing
    changes:
    
    Unhandled fault: external abort on non-linefetch (0x1008) at 0xf03c1010
    ...
    sysc_reset from sysc_probe+0xf60/0x1514
    sysc_probe from platform_probe+0x5c/0xbc
    ...
    
    The fix consists in using the appropriate sleep function in sysc reset.
    For flexible sleeping, fsleep is recommended. Here, sysc delay parameter
    can take any value in [0 - 255] us range. As a result, fsleep() should
    be used, calling udelay() for a sysc delay lower than 10 us.
    
    Signed-off-by: Julien Panis <jpanis@xxxxxxxxxxxx>
    Fixes: e709ed70d122 ("bus: ti-sysc: Fix missing reset delay handling")
    Message-ID: <20230821-fix-ti-sysc-reset-v1-1-5a0a5d8fae55@xxxxxxxxxxxx>
    Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index 5e8c078efd22a..24d589b43dfe7 100644
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -2085,8 +2085,7 @@ static int sysc_reset(struct sysc *ddata)
 	}
 
 	if (ddata->cfg.srst_udelay)
-		usleep_range(ddata->cfg.srst_udelay,
-			     ddata->cfg.srst_udelay * 2);
+		fsleep(ddata->cfg.srst_udelay);
 
 	if (ddata->post_reset_quirk)
 		ddata->post_reset_quirk(ddata);



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