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drm/sti: remove redundant sign extensions 

arg is long int, so arg = (arg << 22) >> 22 makes the upper 22 bits of
arg equal to bit 9 (or bit 41). But we then mask away all but bits 0-9, so
this is entirely redundant.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Reviewed-by: Vincent Abriou <vincent.abriou@st.com>
This commit is contained in:
Rasmus Villemoes 2015-10-16 15:14:55 +02:00 committed by Vincent Abriou
parent 4d5821a71c
commit cebd6fbeb2
1 changed files with 0 additions and 4 deletions
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4
drivers/gpu/drm/sti/sti_awg_utils.c
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@ -65,7 +65,6 @@ static int awg_generate_instr(enum opcode opcode,
mux = 0;
data_enable = 0;
arg = (arg << 22) >> 22;
arg &= (0x3ff);
break;
case REPEAT:
@ -77,14 +76,12 @@ static int awg_generate_instr(enum opcode opcode,
mux = 0;
data_enable = 0;
arg = (arg << 22) >> 22;
arg &= (0x3ff);
break;
case JUMP:
mux = 0;
data_enable = 0;
arg |= 0x40; /* for jump instruction 7th bit is 1 */
arg = (arg << 22) >> 22;
arg &= 0x3ff;
break;
case STOP:
@ -94,7 +91,6 @@ static int awg_generate_instr(enum opcode opcode,
case RPTSET:
case RPLSET:
case HOLD:
arg = (arg << 24) >> 24;
arg &= (0x0ff);
break;
default: