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nios2: fix syscall restart checks
commit2d631bd58f
upstream. sys_foo() returns -512 (aka -ERESTARTSYS) => do_signal() sees 512 in r2 and 1 in r1. sys_foo() returns 512 => do_signal() sees 512 in r2 and 0 in r1. The former is restart-worthy; the latter obviously isn't. Fixes:b53e906d25
("nios2: Signal handling support") Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Dinh Nguyen <dinguyen@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -240,7 +240,7 @@ static int do_signal(struct pt_regs *regs)
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/*
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* If we were from a system call, check for system call restarting...
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*/
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if (regs->orig_r2 >= 0) {
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if (regs->orig_r2 >= 0 && regs->r1) {
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continue_addr = regs->ea;
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restart_addr = continue_addr - 4;
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retval = regs->r2;
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