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ptp: ocp: Fix NULL dereference in Adva board SMA sysfs operations

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[ Upstream commit e98386d79a23c57cf179fe4138322e277aa3aa74 ]

On Adva boards, SMA sysfs store/get operations can call
__handle_signal_outputs() or __handle_signal_inputs() while the `irig`
and `dcf` pointers are uninitialized, leading to a NULL pointer
dereference in __handle_signal() and causing a kernel crash. Adva boards
don't use `irig` or `dcf` functionality, so add Adva-specific callbacks
`ptp_ocp_sma_adva_set_outputs()` and `ptp_ocp_sma_adva_set_inputs()` that
avoid invoking `irig` or `dcf` input/output routines.

Fixes: ef61f5528f ("ptp: ocp: add Adva timecard support")
Signed-off-by: Sagi Maimon <maimon.sagi@gmail.com>
Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Link: https://patch.msgid.link/20250429073320.33277-1-maimon.sagi@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sagi Maimon 2025-04-29 10:33:20 +03:00 committed by Greg Kroah-Hartman
parent c0dba059b1
commit 8a543d825e
1 changed files with 50 additions and 2 deletions
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52
drivers/ptp/ptp_ocp.c
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@ -2574,12 +2574,60 @@ static const struct ocp_sma_op ocp_fb_sma_op = {
.set_output = ptp_ocp_sma_fb_set_output,
};
static int
ptp_ocp_sma_adva_set_output(struct ptp_ocp *bp, int sma_nr, u32 val)
{
u32 reg, mask, shift;
unsigned long flags;
u32 __iomem *gpio;
gpio = sma_nr > 2 ? &bp->sma_map1->gpio2 : &bp->sma_map2->gpio2;
shift = sma_nr & 1 ? 0 : 16;
mask = 0xffff << (16 - shift);
spin_lock_irqsave(&bp->lock, flags);
reg = ioread32(gpio);
reg = (reg & mask) | (val << shift);
iowrite32(reg, gpio);
spin_unlock_irqrestore(&bp->lock, flags);
return 0;
}
static int
ptp_ocp_sma_adva_set_inputs(struct ptp_ocp *bp, int sma_nr, u32 val)
{
u32 reg, mask, shift;
unsigned long flags;
u32 __iomem *gpio;
gpio = sma_nr > 2 ? &bp->sma_map2->gpio1 : &bp->sma_map1->gpio1;
shift = sma_nr & 1 ? 0 : 16;
mask = 0xffff << (16 - shift);
spin_lock_irqsave(&bp->lock, flags);
reg = ioread32(gpio);
reg = (reg & mask) | (val << shift);
iowrite32(reg, gpio);
spin_unlock_irqrestore(&bp->lock, flags);
return 0;
}
static const struct ocp_sma_op ocp_adva_sma_op = {
.tbl = { ptp_ocp_adva_sma_in, ptp_ocp_adva_sma_out },
.init = ptp_ocp_sma_fb_init,
.get = ptp_ocp_sma_fb_get,
.set_inputs = ptp_ocp_sma_fb_set_inputs,
.set_output = ptp_ocp_sma_fb_set_output,
.set_inputs = ptp_ocp_sma_adva_set_inputs,
.set_output = ptp_ocp_sma_adva_set_output,
};
static int